Young’s modulus and Poisson’s ratio changes due to machining in porous microcracked cordierite

R. C. Cooper, G. Bruno, Y. Onel, A. Lange, T. R. Watkins, A. Shyam

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12 Scopus citations

Abstract

Microstructural changes in porous cordierite caused by machining were characterized using microtensile testing, X-ray computed tomography, and scanning electron microscopy. Young’s moduli and Poisson’s ratios were determined on ~215- to 380-μm-thick machined samples by combining digital image correlation and microtensile loading. The results provide evidence for an increase in microcrack density and decrease of Young’s modulus due to machining of the thin samples extracted from diesel particulate filter honeycombs. This result is in contrast to the known effect of machining on the strength distribution of bulk, monolithic ceramics.

Original languageEnglish
Pages (from-to)9749-9760
Number of pages12
JournalJournal of Materials Science
Volume51
Issue number21
DOIs
StatePublished - Nov 1 2016

Funding

Research sponsored by the U.S. Department of Energy, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, as part of the Propulsion Materials Program. Authors thank Peter Tortorelli (ORNL) and J. Allen Haynes (ORNL) for providing a technical review of our manuscript.

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